Automatic stop mechanism for looms



' Sept. 23, 1930. J. BERNINI 1,776,576

AUTOMATIC STOP MECHANISM FOR LOOKS Filed May 9, 1929 3 Sheets-Sheet 1 jg. Z

Efi's- J Inventor Attorney Sept. 23, 1930.

J. BERNINI I AUTOMATIC STOP MECHANISM FOR LOOIS Filed May 9, 1929 3 Sheets-Sheet 3 Attorney Patented Sept. 23, 1930 JoHN 'nEnNINn or ALIIQENTOWN, PENNSYLVANIA AUToMnTIo' STOP-MECHANISM ron LooMs Application filed May 9, 1929. Serial No. 361,727.

The presentinvention appertains to new and useful improvements in looms and more particularly to an improved electrical mechanism for detecting the approaching exhaustion of filling for quills and automatically stopping the loom.

The invention aims to provide means whereby the loom will be stopped when cop or quill in shuttle is almost exhausted, thus saving filling and time for'the weaver and eliminating all imperfections arising from the filling exhausting such as slack picks, broken picks, impression. marks, set marks, etc. This improvementis adapted for use on any standard shuttle Without alteration.

. and claimed hereinafter.

In the drawings Figure 1 represents a fragmentary side ale-- vation of the loom with the improved mechanism mounted thereon. i Figure 2 represents a fragmentary top plan view of the portion of the loomto which the mechanism is to be attached.

1 Fig. 3 represents a fragmentary end ele- Vation ofthe loom showing the mechanism 0 for operating the brake handle. 1 r

Fig. i represents an enlarged end elevation of the loom showing the electro magnetic means for a'ctuatingthe brake means.

i Fig. 5 represents a fragmentarysideeleva- .4 tion of the brake handle operating means in operated position.

Fig. '6 represents a vertical sectional view through one side of the loom and a shuttle with the present invention associated there- 9 with.

represents a fragmentary side elevation of the means for engaging the cop or quill.

Fig. 7 represents an enlarged side elevation of the loom and the circuit closing means.

Fig. 8 represents a side elevationot the spr ng means for urging the fceler arm against the cop or quill.

Fig. 9 is a side elevation of the cop wound with thread.

Fig. 10 is a side elevation of the cop with the thread exhausted and the circuitv closing means engaged therewith incircuit closing poslt on. Y

Referring to the drawings wherein like 65 numerals designate like parts .it will beseen that 20 indicates a vertical sidebar of the loom, while 21 indicates a breast beam and 9. the lay. The shuttle box 8 is supported upon thelay. p i

Pivotally mounted between the side bar 20 and the lay 9 is a vertically disposedbar 10, pivotally mounted'asat 11. to some suitable portion of theloom. The upper portion of the bar 10 has a box 12 for abutment against the shuttle box 8, to impart movement to the bar Men the forward movementof the lay, while a horizontally disposed and L-shaped arm 13 is secured at one end of the top of the side bar 20 and has its opposite end dis. posed in the path of movement of the pivotal bar 10 A curved feeler 14 is swingably mounted to a pin 15 journaled on the upper portion of the bar 10 and this feeler'is provided with a protruding heel portion 16 which is also engageable with the free end portion or the arm 13, which, inab'utting po- .sition therewith, assumes the position seen in Fig. 6 7

As is clearly shown in Figs. 9 and 10, the feeler ltis provided with a laterally disposed foot 17 from which a contact protuberance 18 depends. A plate 19 of suitable di-electric material is secured to thetop side of the foot in a position to snugly receive the lower end portion of the current conductive rod 20. V v The opposite end of the rod is securedbetween a pair. of insulating washers 21*21 to the aforesaid pin 15. The pin 15 at the opp s s e o the a has colla 22 e 9 PATENT OFFICE vflange 48 on the plate 36, while the heel p cured thereto by a suitable set screw 23, and finger projecting tangentially from the collar one end of an expansible spring 25 thereto secured.

The opposite end of the spring is adapted to be connected to the bar 10 as at 26. The spring is adapted to urge the feeler in a downward cop engaging position. 1 The con-.

ductor rod 20 has its free end depending slightly below the contact protuberance 18, so that both of the contacts will engage the conductor plate 2'? at the same time, when the thread is nearly exhausted from the cop 28. A spring strip 29 nmst also be insulated from bar 10 and fastening 30.

The feeler has a bearing block 31 which serves to protect the filling and tensionally engage the filling until the same is substantiaily exhausted, when it assumes the position shown in Fig. 10. A spring 32 is provided at the pivot point 11 of the bar 10' for the obvious purpose of maintaining the bar 10 normally in the position shown. The conductor wires 33 extend from the fixed end of the spring strip 29 to one side of a solenoid 34, and from the opposite side of the solenoid, to the positive side of a battery 35 or in fact, any'suitable current supply. The opposite side of the battery 35 is preferably grounded to the frame of the loom.'

A vertically disposed base 36 is secured to thebar20 and this bar has a pair of vertically spaced apertured ears 37 and 38. The car 37 has a vertical opening in the rein for slidably receiving the vertical bar 39, while the car 38 has a pin 39 projecting laterally therefrom and spacedly from the plate 36 for receiving the tapered pawl 40, the free end being the reduced portion of the same. The cotter pin 41 is engageable through the free end portion of the pin-39 to maintain the pawl on the pin, while a spring 42 normally maintains the reduced free end of the pawl engaged against the plate 36, in the manner clearly shown in Fig. 3.

A bracket 43 secured to the side of the loom serves to guide the vertical bar 44, the latter having a linger 45 projecting laterally at its lower end normally engaged by.the tension of the spring 46'against the upper end of an L-shaped rocker arm 47. The upper end of the rocker arm rides against the arcuate tion of the arm is enlarged as at 49 to receive the pintle 5O projecting fromthe plate 36.

An expansible spring 51is interposed between the lower end of the arm. 47 and the flange 48 for maintaining the arm in the position shown and against the shoulder 52 on the flange 48. The solenoid 34 has an armature 53 pivotally connected at its upper end as at 54 to the lower end of the -L-shaped arm 47. The upper end of the vertical slide bar 44 is pivotally connected to the member 55 on the usual brake handle 56 of the loom.

This brake lever is of standard equipment on most looms, and a specific description thereof is not thought necessary. The lower end of the slide bar 39 is pivotally connected to a bell crank 57 attached to the oscillatory shaft 58 which oscillates with the reciprocating movement of the lay.

It will thus be seen that when the thread on the cop 28 nears exhaustion, the contacts 18 and 20 will engage the conductor 27 on the cop and complete a circuit from the positive side of the battery 35 through the solenoid 34 to ground; The energized solenoid 34 will attract the armature 53, which inturn will release the arm 47 and displace the upper end thereof from the finger 45 of the vertical slide bar 44. The releasement of bar 4.4 will result in the lower end of the same moving toward the loom frame and the engagement of the finger 45 against the plate 36. The pawl 40 serves to guide the lower end of the bar 44 outwardly on its downward stroke so that the said lower end will engage the outer side of the arm 47 The bar 44, thus'assumes the position directly in the path of movement of the com plementary slide bar 39 which on its next stroke upwardly will engage the lower end of the bar 44 and move the same upwardly to throw the brake lever 56-and thus stop the operation of the loom. It will be noted that on the upstroke of the bar 44, the finger 45 will pass behind the pawl 40 to a position above the latter.

-It will thus be seen that the present invention presents a simple, inexpensive, and positive acting adjunct to looms which, in operation will be automatic and which through constant use will'necessitate but few adjustments and infrequent repairs or replacement.

Obviously, various changes in the specific shape, sizeand materials may be resorted to in the construction of the mechanism, without departing from the spirit or scope of the same as claimed hereinafter.

Having thus described my invention, what I claim as new is 1. .A stop mechanism for looms comprising a pair of reciprocating bars, one of said bars being connected to the usual lay actuating shaft, the other bar being pivotally connected to the usual brake mechanism of the loom, means engageable with the thread supporting means of the leg for releasing the said means of the loom so that the brake bar will be actuated by the reciprocatory bar, an electrical magnetic circuit, a rockable member normally maintaining the brake connecting bar out of the'path of the reciprocatory bar and being connected to the electro-magnet and being movable when the magnet is energized to release said brake connected bar, and means for guiding the brake bar to a position out of the path of the reciprocating bar when the loom is again started.

2. A stop mechanism for looms comprising a pair of reciprocatory bars, one of said bars being connected to the usual lay actuated" shaft, the other bar being pivotally connected 7 to the usual brake mechanismof the loom,

means engageable with the thread supporting means of the loom for releasing the'saidmeans so that the brake bar Will be actuated by the other bars, an electro-magnetic circuit a rockable member normally maintaining the brake connecting bar out of the path of the reciprocatory bar and connected to the electro-magnet and being movable When the mag net is energized to release the brake connection bars, and means for guiding the brake connection bar into a position out of the path of the reciprocatory bar When the loom is again started, said means comprising a spring tensioned arm behind Which the said bar may move on its upward stroke to a position above the same. i

In testimony whereof I affiX my signature,

JOHN BERN INI. 

